Issue #2081167 by smiro: Remove Unused local variable  from /core/modules/block/custom_block/lib/Drupal/custom_block/CustomBlockStorageController.php.

Issue #2080399 by Haza: Remove Unused local variable  from /core/modules/simpletest/lib/Drupal/simpletest/WebTestBase.php.

Issue #2081189 by mrsinguyen, smiro: Remove Unused local variable  from /core/modules/language/lib/Drupal/language/HttpKernel/PathProcessorLanguage.php.

Issue #2080403 by mrsinguyen: Remove Unused local variable  from /core/modules/simpletest/lib/Drupal/simpletest/Tests/DrupalUnitTestBaseTest.php.

Issue #2081193 by mrsinguyen: Remove Unused local variable  from /core/modules/views_ui/views_ui.module.

Issue #2080405 by mrsinguyen: Remove Unused local variable  from /core/modules/simpletest/lib/Drupal/simpletest/Tests/MailCaptureTest.php.

Issue #2080321 by sandergo90, guregori: Remove Unused local variable  from /core/modules/system/lib/Drupal/system/Tests/Common/JavaScriptTest.php.

Issue #2080421 by mrsinguyen: Remove Unused local variable  from /core/modules/book/lib/Drupal/book/Tests/BookTest.php.

Issue #2079981 by mrsinguyen: Remove Unused local variable  from /core/modules/node/lib/Drupal/node/Tests/Views/StatusExtraTest.php.

Issue #2080597 by sandergo90, mrsinguyen: Remove Unused local variable  from /core/modules/user/lib/Drupal/user/Tests/UserLanguageTest.php.

Issue #2081175 by smiro: Remove Unused local variable  from /serialization/lib/Drupal/serialization/RegisterSerializationClassesCompilerPass.php.

Issue #2080371 by mrsinguyen: Remove Unused local variable  from /core/modules/statistics/lib/Drupal/statistics/Tests/StatisticsLoggingTest.php.

Issue #2081177 by smiro: Remove Unused local variable  from /core/modules/menu_link/lib/Drupal/menu_link/MenuLinkStorageController.php.

Issue #2080105 by rhm50: Remove Unused local variable  from /core/modules/system/lib/Drupal/system/Tests/Plugin/CacheDecoratorTest.php.

Issue #2122321 by StephaneQ, jhodgdon: Search_embedded_form test module is improperly using config instead of state.

Issue #2080309 by aaronott: Remove Unused local variable  from /core/modules/system/lib/Drupal/system/Tests/Database/AlterTest.php.

Issue #2080303 by aaronott: Remove Unused local variable  from /core/modules/system/lib/Drupal/system/Tests/Database/LoggingTest.php.

Issue #2080295 by mcrittenden: Remove Unused local variable  from /core/modules/system/lib/Drupal/system/Tests/Database/SchemaTest.php.

Issue #2080119 by mcrittenden: Remove Unused local variable  from /core/modules/system/lib/Drupal/system/Tests/Database/InsertDefaultsTest.php.

Issue #2080305 by aaronott: Remove Unused local variable  from /core/modules/system/lib/Drupal/system/Tests/Database/FetchTest.php.

Issue #2080715 by dags, chertzog: Remove Unused local variable  from /core/modules/tracker/tracker.module.

Issue #2100121 by StephaneQ | Berdir: Documentation about changing cache backend in CacheBackendInterface is outdated.

Issue #2080291 by justinchev: Remove Unused local variable  from /core/modules/system/lib/Drupal/system/Tests/Database/CaseSensitivityTest.php.

Issue #2080689 by BerdArt, chertzog: Remove Unused local variable  from /core/modules/update/update.fetch.inc.

Issue #2080671 by royal121, mcrittenden, Haza: Remove Unused local variable  from /core/modules/field/lib/Drupal/field/Tests/Views/HandlerFieldFieldTest.php.

Issue #2080033 by royal121, mrsinguyen: Remove Unused local variable  from /core/modules/views_ui/lib/Drupal/views_ui/Form/Ajax/Display.php.

Issue #2089461 by thedavidmeister, deneo, Alan D., dsdeiz, stpaultim: Convert all calls to check_plain() in core to Drupal\Component\Utility\String::checkPlain() in core/lib.

Issue #2080425 by mrsinguyen: Remove Unused local variable  from /core/modules/editor/lib/Drupal/editor/Tests/EditorLoadingTest.php.

Issue #2080357 by mrsinguyen: Remove Unused local variable  from /core/modules/system/lib/Drupal/system/Tests/Ajax/DialogTest.php.

Issue #2072625 by rhm50, legolasbo: Remove Unused local variable  from /core/modules/views/lib/Drupal/views/Tests/Handler/FilterDateTest.php.

Issue #2080607 by CaptainWonky, mrsinguyen: Remove Unused local variable  from /core/modules/user/lib/Drupal/user/Tests/Views/HandlerFieldRoleTest.php.

Issue #2081155 by smiro: Remove Unused local variable  from /core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterCaption.php.

Issue #2061969 by InternetDevels, andypost: Replace user_access() calls with ->hasPermission() in aggregator module.

Issue #2080115 by aaronott: Remove Unused local variable  from /core/modules/system/lib/Drupal/system/Tests/Cache/GenericCacheBackendUnitTestBase.php.